/** 
 * <p>Original Author:  jessefreeman</p>
 * <p>Class File: AbstractEffect.as
 * 
 * <p>Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:</p>
 * 
 * <p>The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.</p>
 * 
 * <p>THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.</p>
 * 
 * <p>Licensed under The MIT License</p>
 * <p>Redistributions of files must retain the above copyright notice.</p>
 *
 * <p>Revisions<br/> 
 * 	0.1  Initial version Dec 26, 2008</p>
 *
 */

package camo.views.effects
{
	import camo.utils.ImageUtility;
	import camo.views.display.CamoDisplay;
	
	import flash.events.Event;
	import flash.events.EventDispatcher;
	
	public class AbstractEffect implements IEffect
	{
		
		protected var _imgUtil:ImageUtility;
		protected var _effectTarget:CamoDisplay;
		protected var _autoUpdate:Boolean;
		public var defaultEventType:String = Event.ENTER_FRAME;
		
		public function set autoUpdate(value:Boolean):void{
			_autoUpdate = value;
			if(_effectTarget){
				if(_autoUpdate)
					registerEventListeners(_effectTarget);
				else
					removeEventListeners(_effectTarget);
			}
				
		}
		
		public function AbstractEffect()
		{
			_imgUtil = ImageUtility.instance;
			init();
		}
		
		protected function init():void{
			
		}
		
		public function register(target:CamoDisplay):void{
			_effectTarget = target;
			refresh();
			if(_autoUpdate)
				registerEventListeners(_effectTarget);
		}
		
		public function remove():void{
			
		}
		
		protected function registerEventListeners(target:EventDispatcher):void{
			target["display"].addEventListener(defaultEventType, onUpdate, false, 0, true);
		}
		
		protected function removeEventListeners(target:EventDispatcher):void{
			target["display"].removeEventListener(defaultEventType, onUpdate);
		}
		
		protected function onUpdate(e:* = null):void{
			refresh();
		}
		
		public function refresh():void{
			
		}
		
	}
}